Classifying – separating – and assorting solids – Precedent preparation of items or materials to facilitate... – Sorting special items or sorting by methods and apparatus...
Patent
1985-04-03
1987-09-01
Reeves, Robert B.
Classifying, separating, and assorting solids
Precedent preparation of items or materials to facilitate...
Sorting special items or sorting by methods and apparatus...
209555, 209583, 235476, 235489, 235494, B07C 534
Patent
active
046907513
DESCRIPTION:
BRIEF SUMMARY
The invention lies in the field of the transport of piece goods and relates to a method for sorting out certain containers, such as industrial containers, bottle crates etc., from a stock of containers and to a device on a container for the identification of a to be sorted out container whereby containers from a stock of containers are sorted out by means of optical detection characterized in that the containers of a common issue are provided with a specific marking from which it can be noted that they belong together, in that after being mixed up during use the containers of a common issue are again brought together and in that the sorted quantity of a common issue is eliminated from the overall quantity.
Bottle crates as containers for a certain number of bottles, belong to the type of re-usable containers, the circulation factor of which, ie. the number of re-utilizations, may assume quite high values. At an average circulation time of 5 days and an average service life of a plastic bottle crate of 8 years, an average circulation factor of close on 600 can be expected. This relates in an idealised manner to one item and its service life, during which these circulations naturally do not take place in a uniform manner, ie. seen on a time axis shorter and longer cycles are the cause of an inhomogeneous distribution. If, for example, a total of 1000 crates is brought into circulation at the same time, the initially sequenced quantity very quickly comes out of sequence, so that already in the first third of the average life of a crate one can expect a broad distribution of the individual circulation factors in accordance with the laws on statistics.
An additional problem is created by the requirement that a container, eg. a bottle crate, should not be used after it is damaged and also not after it presents a shabby appearance. Such bottle crates must be removed from circulation in good time. Furthermore, one must still take into account the remarkably high number of bottle crates of a stock of bottle crates, which may easily run into millions. Together with the dropping out of sequence within individual issues of new bottle crates during the circulation and the dropping out of sequence of the various issues amongst one another, there would result in time an intimately mixed stock of recent bottle crates which, however, due to many circulations have aged quickly, and old bottle crates which because of a gentle treatment have remained intact. There also often occur defective series of any type and quantity. Thus, in the case of bottle crates for example, it is important that one is able to eliminate certain defective series, the defectiveness relating mainly to a lack of mechanical stability, seeing that this type of transport containers may be stacked very high and such defective items may cause such a stacking system to collapse. However, to keep such an overall stock to a certain degree in a usable condition by a sorting out of battered, defective and unsatisfactory bottle crates, requires a lot of work and is quite costly.
Nevertheless, more and more breweries, for example, intend to sort out their stock of bottle crates and to eliminate aged bottle crates. This also applies, however, to other branches where the stock of containers reaches considerable numbers.
It is the aim of the invention to indicate a method by which the sorting out of aged and/or defective containers, as well as of containers which at an early stage are recognised as having been made defectively, eg. industrial containers, bottle crates, etc., from a stock of containers of any size, ie. from any quantity, can take place in the shortest possible time and in an economical manner.
It is furthermore the aim of the invention to create, with a view to such large numbers of items, an as economical as possible device by which the method for the sorting out can be performed.
Furthermore it is the aim of the invention to design the device in such a manner that the conventional and to some extent already existing means for the sorting out can be
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Alexander Schoeller & Co. AG
Reeves Robert B.
Wacyra Edward M.
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